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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.event;
import com.google.common.collect.ImmutableSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Base implementation of event sink registry.
*/
public class DefaultEventSinkRegistry implements EventSinkRegistry {
private final Map<Class<? extends Event>, EventSink<? extends Event>>
sinks = new ConcurrentHashMap<>();
@Override
public <E extends Event> void addSink(Class<E> eventClass, EventSink<E> sink) {
checkNotNull(eventClass, "Event class cannot be null");
checkNotNull(sink, "Event sink cannot be null");
checkArgument(!sinks.containsKey(eventClass),
"Event sink already registered for %s", eventClass.getName());
sinks.put(eventClass, sink);
}
@Override
public <E extends Event> void removeSink(Class<E> eventClass) {
checkNotNull(eventClass, "Event class cannot be null");
checkArgument(sinks.remove(eventClass) != null,
"Event sink not registered for %s", eventClass.getName());
}
@Override
@SuppressWarnings("unchecked")
public <E extends Event> EventSink<E> getSink(Class<E> eventClass) {
checkNotNull(eventClass, "Event class cannot be null");
return (EventSink<E>) sinks.get(eventClass);
}
@Override
public Set<Class<? extends Event>> getSinks() {
return ImmutableSet.copyOf(sinks.keySet());
}
}
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